TWI832956B - Structure for fixing temporary support - Google Patents

Abstract

[Issue] The removal of temporary supports at high places can be simplified and the labor burden on workers can be reduced more than ever before. [Technical Content] The present invention relates to a structure in which a temporary support (5) for construction is fixed to the aforementioned outer tank (3) when constructing a double-shell tank composed of an inner tank and an outer tank. It has the following features: The embedded metal fitting (14) in the concrete constituting the structure of the side wall (4) of the outer tank (3), and the female threaded member (15) (joint portion) connected to the embedded metal fitting (14), and are fixed A temporary support (5) is detachably attached to the female thread member (15), and a bolt (16) (joint) that fixes the temporary support (5) to the female thread member (15).

Description

Temporary support fixed structure

This disclosure relates to a temporary support fixing structure for fixing a temporary support to the outer tank when constructing a double-shell tank consisting of an inner tank and an outer tank.

Generally, double-shell tanks having an inner tank and an outer tank are used to store cryogenic liquids such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas). When constructing such a double-shell tank, in order to shorten the construction period required for the construction of the tank, a metal inner tank and a concrete outer tank are generally constructed at the same time.

More specifically, after the side walls of the outer tank are assembled to a certain height, a jack lifting device is installed on the side wall through temporary supports. While the jack lifting device is used to raise the eaves of the inner tank in stages, the side panels of the inner tank are raised. Those from the uppermost section are added sequentially from the bottom to the bottom of the eaves of the inner groove. Furthermore, during the raising process of the aforementioned inner groove eaves, the outer groove eaves are assembled on the inner groove eaves.

In addition, prior technical document information related to the simultaneous construction technology of the inner tank and the outer tank in this double-shell tank barrel includes the following patent document 1 and so on. [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent No. 5732262

[Problem to be solved by the invention]

However, conventionally, the temporary support is fixed by welding to an embedded metal piece embedded in the concrete that forms the side wall of the outer tank, and the jack lifting device is coupled to the temporary support by bolts or the like. , in this case, the aforementioned temporary support member will greatly jump out from the side wall of the aforementioned outer tank. Therefore, after using the temporary support, it is necessary to cut off the gas (acetylene) at a high place and dismantle it, which poses a problem of heavy labor burden on the operator.

Here, the temporary support fixing structure disclosed in the present disclosure is based on this fact, and can simplify the removal operation of the temporary support in a high place and reduce the labor burden of the operator than before. [Technical means used to solve problems]

The temporary support fixing structure disclosed in the present disclosure is a structure in which the temporary support used in construction is fixed to the outer tank when constructing a double-shell tank barrel composed of an inner tank and an outer tank. The embedded metal parts in the concrete of the structure of the side wall of the tank, the joint part connected to the embedded metal parts, and the temporary support member fixed to the joint part in a detachable manner, and the temporary support member is fixed to The coupling tool of the aforementioned coupling part.

In the temporary support fixing structure, the embedded metal member includes a base bracket arranged on the inner periphery of the side wall of the outer tank, and a base bracket connected to the back surface of the base bracket and embedded in the base bracket. Anchor bolts in the concrete of the aforementioned side walls are preferred.

Furthermore, in the temporary support fixing structure, the connecting portion is embedded in the concrete of the side wall in a state of being screwed with the anchor bolt, and is welded to the base pallet in line with the bolt hole. A female threaded member having a dead end threaded hole formed continuously with the bolt hole on the back side is preferred.

Furthermore, in the aforementioned temporary support member fixing structure, the aforementioned temporary support member may be a jack support member for constructing the aforementioned inner tank. [Effects of the invention]

According to the above-mentioned temporary support fixing structure of the present invention, the removal operation of the temporary support at a high place can be simplified and the labor burden of the operator can be significantly reduced than before.

Hereinafter, embodiments of the present invention in the present disclosure will be described with reference to the attached drawings.

Figures 1 to 6 show an embodiment of the temporary support fixing structure of the present disclosure. As shown in outline in Figure 6, when building cryogenic liquids such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas) In the case of the double-shell tank 1 for storage, in order to shorten the construction period, the metal inner tank 2 and the concrete outer tank 3 are constructed at the same time. That is, the jack raising device 6 is installed on the side wall 4 of the outer tank 3 that has been assembled to a certain height through the temporary support 5, and the inner tank eaves 7 are raised in steps through the jack raising device 6. The elbow support plate 8 adds the inner groove side plates 9 from the uppermost section to the bottom of the inner groove eaves 7.

Here, the jack lifting device 6 is, for example, a center hole jack that can lift the hanging portion 10 mounted on the curved outer peripheral surface of the elbow rest 8 through the jack lifting rod 11 . In addition, reference numeral 12 in Figure 6 is a temporary assembly stand for assembling the inner tank side panel 9, and reference numeral 13 is an anchor strap of the inner tank 2 previously installed under the assembly stand 12.

When building this kind of double-shell tank barrel 1, when the aforementioned temporary support 5 is fixed to the aforementioned outer tank 3 as a jack support, the characteristics of this embodiment are as shown in detail in Figures 1 to 5. The point where the support is temporarily fixed to the structure. More specifically, the embedded metal member 14 is embedded in the concrete constituting the structure of the side wall 4 of the outer tank 3, and the temporary support member 5 is fixed to the embedded metal member by bolts 16 (joints). The female thread member 15 (joint part) connected to the parts 14 is detachable.

Here, the embedded metal fitting 14 includes a base bracket 17 arranged on the inner periphery of the side wall 4 of the outer tank 3 and a back surface connected to the base bracket 17 and embedded in the side wall 4 Structure of concrete anchor bolts 18. The base bracket 17 has a rectangular plate shape and is arranged along the inner circumferential surface of the side wall 4. The anchor bolts 18 are embedded at right angles (horizontally) into the inner circumference of the side wall 4 of the outer tank 3. noodle.

Especially as shown in detail in Figure 4, the connection of the anchor bolts 18 on the back side of the base pallet 17 is by being embedded in the concrete of the side wall 4 in a state of being screwed with the anchor bolts 18 and The female screw member 15 is welded to the back surface of the base plate 17 in line with the bolt hole 19 and has a dead end threaded hole 20 formed continuously with the bolt hole 19 for connection.

That is, the female thread member 15 has a dead end threaded hole 20 and a threaded hole 21 at both ends in the longitudinal direction. Furthermore, the bolt 16 (joint) that passes through the bolt hole 23 of the mounting bracket 22 of the temporary support 5 is screwed into one of the threaded holes 20, and the bolt 16 is coupled to the female thread member 15. The temporary support 5 is fixed to the base plate 17 . Furthermore, the aforementioned anchor bolt 18 is screwed into the other threaded hole 21 .

And in the example shown in the figure, the two upper sections of anchor bolts 18 are relatively longer than the lower one section of anchor bolts 18, and in the front end portion of the upper two sections of anchor bolts 18, there is a A flat fixing plate 24 is formed in a direction perpendicular to the longitudinal direction of the anchor bolt 18 . That is, the ability to withstand the pulling force is enhanced, even if a strong pulling force acts on the upper two stages due to the load applied during the jack lifting operation due to the jack lifting device 6 (refer to Figure 6) installed on the temporary support 5. The anchor bolts 18 of the upper two sections can also withstand it.

Furthermore, the two lowermost sections of the aforementioned mounting bracket 22 are formed on the side of the aforementioned base bracket 17 by directly screwing the bolts 27 through the bolt holes 26 of the aforementioned mounting bracket 22, as shown in detail in Figure 5. threaded hole 25 to be fixed. However, the cap 28 is welded to the back surface of the threaded hole 25 formed on the base plate 17 side, and the threaded hole 25 is airtightly blocked by the cap 28 .

The outer tank side plates 29 made of steel filler plates are assembled on the inner peripheral surface of the concrete constituting the structure of the side wall 4 of the outer tank 3. In this case, the above concrete can be used as a formwork during grouting. . Here, the base bracket 17 is arranged to be exposed from the opening 30 formed in the outer tank side plate 29, and the opening 30 and the outer edge portion of the base bracket 17 are welded airtightly.

On the other hand, the temporary support 5 is provided with a pair of I-shaped steel beams 31 protruding toward the inside of the tank from the mounting bracket 22 coupled to the base bracket 17 with bolts 16. On both sides of the beam 31, a plurality of beam members 32 serving as working spaces (scaffolding) project in a horizontal direction that is perpendicular to the protruding direction of the beam 31.

In addition, ribs 33 extending in the up and down direction are formed in the center and both sides of the base plate 17 of the temporary support 5 in the width direction. This can increase the strength and enable it to withstand when the temporary support 5 is installed. The load applied by the jack raising device 6 when performing the jack raising operation.

Then, in this case, the mounting bracket 22 of the temporary support 5 is overlapped on the front surface of the base bracket 17 and the positions of the bolt holes 19 and 23 are aligned with each other, and the bolts 16 are passed through the bolt holes 19 and 23 and Screw into the threaded hole 20 of the female thread member 15 to fix the temporary support 5 to the base plate 17. Install the jack lifting device 6 on the temporary support 5 to perform the jack lifting operation. At this time, if the two places at the lowermost section of the mounting bracket 22 are connected to the threaded holes 25 on the base bracket 17 side by bolts 27, the fixation can also be strengthened.

And after the jack lifting operation using the jack lifting device 6 is completed, when the aforementioned temporary support 5 is removed, only loosen and remove the bolts 16 and 27 to release the temporary support 5 from the aforementioned base support plate 17 By fixing it, the temporary support 5 can be easily removed from the aforementioned base support plate 17.

Therefore, according to the above embodiment, the temporary support 5 is detachably coupled to the female threaded member 15 of the embedded metal member 14 embedded in the concrete constituting the side wall 4 of the outer tank 3. After the temporary support 5 is used, it can be removed without cutting off the gas. Therefore, the removal operation of the temporary support 5 at a high place can be simplified and the labor burden on the operator can be reduced more than before.

Furthermore, in the case of this embodiment, the embedded metal member 14 includes a base bracket 17 arranged on the inner periphery of the side wall 4 of the outer tank 3, and a base bracket 17 connected to the back surface of the base bracket 17. Anchor bolts 18 are embedded in the concrete of the side wall 4 . With such a structure, the base pallet 17 can be strongly and stably supported by the anchor bolts 18 embedded deeply in the concrete of the side wall 4 .

The connecting portion for fixing the temporary support 5 is made of concrete embedded in the side wall 4 with the anchor bolts 18 screwed together, and is welded to the base pallet in line with the bolt holes 19. 17 and has a female thread member 15 having a dead end threaded hole 20 formed continuously with the bolt hole 19 .

With such a structure, after the bolts 16 are removed, the airtightness of the base bracket 17 can be ensured through the dead-end threaded holes 20, and the base bracket 17 can be directly used as part of the outer tank side plate 29. , after the operation is completed, there is no need to perform additional filler installation work to maintain air tightness.

In addition, the female thread member 15, which is the connecting portion for fixing the temporary support 5, can be incorporated into a part of the embedded metal member 14 and be well embedded in the concrete of the side wall 4, and can also contribute to the base. The connection between the supporting plate 17 and the aforementioned anchor bolts 18.

In this embodiment, the temporary support 5 serves as a jack support for constructing the inner tank 2 (see Figure 6). With such a structure, the temporary support 5 can be easily fixed and removed, and the inner groove eaves 7 of the jack lifting device 6 installed through the temporary support 5 can be efficiently used (as the process progresses). The latter stage also includes the jack lifting operation of the outer trough eaves) stage.

Furthermore, the above description has been made of the case where the outer tank side plate 29 serving as a formwork for grouting the concrete is assembled on the inner peripheral surface of the concrete constituting the structure of the side wall 4 of the outer tank 3. However, according to the construction of the double shell tank 1 In some construction methods, concrete blocks are made and piled high to form the side walls 4 of the outer tank 3 . In this case, the temporary support 5 is attached and detached to a part of the concrete block through the embedded metal fitting 14 and the female thread member 15 that have been buried in advance, and the above-mentioned jack lifting operation is performed, and the temporary support 5 is After dismantling, the steel filler plate is attached inside to become the outer tank side plate 29.

Therefore, in the case of the construction method performed by this procedure, it is not necessary to use the female thread member 15 having the dead-end threaded hole 20 as the coupling part. For example, as shown in another embodiment in Figure 7, a sleeve-shaped female thread member 15' having female threads 20' and 21' formed at both ends in the longitudinal direction and open in the longitudinal direction may be used.

That is, when the sleeve-shaped female thread member 15' is used, the female thread member 15' will be loosened by loosening and removing each bolt 16 every time the temporary support 5 is removed after use. If the inside of the base plate 17 is opened, the airtightness of the base support plate 17 itself cannot be maintained. However, since the steel filler plate is attached inside and constructed into the outer tank side plate 29 in the subsequent process (refer to the two-dot dotted line in Figure 7), the aforementioned base pallet 17 can be covered by the outer tank side plate 29. Can maintain air tightness.

In this embodiment, the temporary support 5 is detachably coupled to the female threaded member 15' of the embedded metal member 14 embedded in the concrete constituting the side wall 4 of the outer tank 3. The support 5 can be dismantled without cutting off the gas after use. This makes it easier to dismantle the temporary support 5 at a high place and reduces the labor burden on the operator more than ever before.

Moreover, the temporary support member fixing structure of the present invention is not limited to the above-mentioned embodiments described in the present disclosure. The temporary support member is not limited to the jack support member. Of course, other structures can be used within the scope that does not deviate from the essence of the present invention. Plus various changes.

1:Double shell tank barrel 2:Inner tank 3:Outer tank 4:Side wall 5: Temporary supports 6: Jack lifting device 7: Inner groove eaves 8: Elbow support board 9: Inner tank side plate 10: hanging part 11: Jack lifting rod 12: Assembling the stand 13:Anchor strap 14: Buried metal parts 15:Female thread member (joint part) 15’: Female thread component (joint part) 16: Bolt (joint tool) 17:Base pallet 18:Anchor bolts 19: Bolt hole 20:Threaded hole 20’, 21’: Female thread 21:Threaded hole 22:Install the pallet 23: Bolt hole 24: Fixing plate 25:Threaded hole 26: Bolt hole 27:bolt 28:Cap 29:Outer tank side plate 30: opening 31:Liang 32:Beam member 33: Rib

[Fig. 1] shows a schematic diagram of an embodiment of the present disclosure. [Picture 2] View of the arrow in the II-II direction of Figure 1. [Figure 3] Cross-sectional view as viewed by arrow III-III in Figure 2. [Fig. 4] A detailed cross-sectional view of the female thread member in Fig. 1 is shown. [Fig. 5] shows a detailed cross-sectional view of the cap in Fig. 1. [Figure 6] An explanatory diagram of the jack raising operation performed by the jack raising device. [Fig. 7] shows a cross-sectional view of another embodiment of the present disclosure.

3:Outer tank

4:Side wall

5: Temporary supports

14: Buried metal parts

15:Female thread member (joint part)

16: Bolt (joint tool)

17:Base pallet

18:Anchor bolts

22:Install the pallet

24: Fixing plate

27:bolt

28:Cap

29:Outer tank side plate

30: opening

31:Liang

32:Beam member

33: Rib

Claims (4)

A temporary support fixing structure is a structure for fixing temporary supports for construction to the outer tank when constructing a double-shell tank barrel composed of an inner tank and an outer tank, and includes: being buried in the outer tank that constitutes the outer tank The embedded metal parts in the concrete of the side wall structure, the joint part connected to the embedded metal parts, and the temporary support member fixed to the joint part removably, and the temporary support member is fixed to the aforementioned The connecting tool of the joint part, the embedded metal member, includes a base pallet arranged on the inner periphery of the side wall of the outer tank, and a back surface of the base pallet connected to the base pallet and embedded in the concrete of the side wall. The anchor bolt, the aforementioned connecting portion, is embedded in the concrete of the aforementioned side wall in a state of being screwed with the aforementioned anchor bolt, and is welded to the back of the aforementioned base pallet in line with the bolt hole, and has a hole corresponding to the bolt hole. Continuously forming a dead-end threaded hole in a female threaded member. The temporary support member fixing structure of claim 1, wherein the aforementioned temporary support member is a jack support member used for constructing the aforementioned inner tank. The temporary support fixing structure of claim 1 or 2, wherein the upper anchor bolts are relatively longer than the lower anchor bolts. Such as the temporary support fixing structure of claim 3, wherein, A fixing plate forming a flat surface in a direction perpendicular to the longitudinal direction of the anchor bolt is provided at the front end portion of the upper anchor bolt which is longer than the lower anchor bolt.

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